Lecanoraceae Myriolecis semipallida (Lecanora semipallida) Growth type crustose Chemical results: Thallus negative. Apothecium margin K+ yellow, C+/- yellow, KC+ yellow, P-. Discs UV+ yellow or orange Common and widespread on calcareous rocks and especially on hard limestone Endolithic grey to blackish thallus with groups of apothecia with wide, white margins. Discs pale brown to greyish-brown, sometimes slightly pruinose. Hymenium covered with dense layer of epithecial granules that dissove in K Similar: Lecanora dispersa, epithecial granules insoluble in K

Lecanora semipallida
On concrete block. Brands Bay, Dorset. January 2015